Actually, I tried another tutorial more than six months ago and had become busy with work - so I was hoping there was a way I could start over without reinstalling my operating system or ruining my apache config/bind setup.

So to be honest, I'm not sure what I've done in the past but I did remove the postfix package with apt prior to doing the new tutorial in hopes it would allow me to begin from scratch..

but I did remove the postfix package with apt prior to doing the new tutorial in hopes it would allow me to begin from scratch..

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That didn't work out as your main.cf contains lots of placeholders (like {MTA_MAILBOX_MIN_UID}) that should probably have been replaced with actual values, probably by the VHCS2 installer or something like that. I suggest you set the system up from scratch.